Abstract

Withthe advent of the 5G era, the demand for data communication is increasing explosively. Extending the L-band gain bandwidth is considered to be the most direct and effective approach to increasing communication capacity. However, the signal excited state absorption (SESA) prevents the L-band gain from extending to longer wavelength. In this report, Er³⁺ and Ce³⁺ are introduced into the phosphosilicate fiber to regulate the SESA. The results show that the addition of Ce3+ into the phosphosilicate fiber can weaken the effect of SESA and extend the L-band gain bandwidth. The SESA of the Er³⁺/Ce³⁺ co-doped phosphosilicate fiber do not begin until 1620 nm, which is shifted and suppressed efficiently. The longest wavelength of the Er³⁺/Ce³⁺ co-doped phosphosilicate fiber is extended to 1623 nm. This result provides an effective approach to realizing the extended L-band amplification.

Extending the L-band amplification to 1623 nm using Er/Yb/P co-doped phosphosilicate fiber

Yang Chen, Yang Lou, Zhimu Gu, Qiang Qiu, Le He, Wenzhen Li, Xiaoke Yin, Xinyue Zhao, Shaokun Liu, Jinggang Peng, Haiqing Li, Yingbin Xing, Yingbo Chu, Nengli Dai, and Jinyan Li
Opt. Lett. 46(23) 5834-5837 (2021)

High-efficiency cladding-pumped Er/Yb co-doped alumino-phosphosilicate fiber for an extended L-band amplification

Le He, Yang Chen, Xiaoke Yin, Zhimu Gu, Shaokun Liu, Wenzhen Li, Yingbin Xing, Yingbo Chu, Nengli Dai, and Jinyan Li
Opt. Lett. 49(1) 61-64 (2024)

Extended L-band 4-Core Er/Yb co-doped fiber amplifier based on 1018 nm cladding pumping

Le He, Qiang Qiu, Xiaoke Yin, Zhimu Gu, Shaokun Liu, Wenzhen Li, Yingbin Xing, Yingbo Chu, Nengli Dai, and Jinyan Li
Opt. Express 31(16) 25557-25570 (2023)

Extended L-band few-mode Er/Yb Co-doped fiber amplifier with a cladding-pumped pseudo-two-stage configuration

Qiang Qiu, Le He, Zhimu Gu, Yang Chen, Yang Lou, Xinyue Zhao, Jinggang Peng, Haiqing Li, Yingbin Xing, Yingbo Chu, Nengli Dai, and Jinyan Li
Opt. Lett. 47(12) 2963-2966 (2022)

Er-doped silicate fiber amplifiers in the L-band with flat gain

Yan Sun, Xin Wang, Qiubai Yang, Yafei Wang, Fan Wang, Lili Hu, Chunlei Yu, Meisong Liao, and Shubin Chen
Opt. Lett. 49(4) 989-992 (2024)